US2774803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductive stirring device for metallurgical furnace
Assignee: ABB Norden Holding AB
•
Filing: 1953-09-08
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Granted: 1956-12-18
•
Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
F; F27; F27D; F27D27/00; B; B01; B01F; B01F33/00; B01F33/45; B01F33/452; G; G01; G01N; G01N35/00; G01N35/02; G01N35/021; F27D3/00; F27D2003/0034; F27D2003/0039; G01N2035/00465; G01N2035/00524; G01N35/04; G01N2035/0401; G01N2035/0406; G01N2035/0408
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |